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EFFICACY OF INDIGENOUS Trichoderma STRAIN ON FOOT ROT OF TOMATO SEEDLINGS INDUCED BY Rhizoctonia solani UNDER GREENHOUSE CONDITIONS (Pages : 8 - 11)

M.M. ISLAM, A. AKTER AND M.D. HOSSAIN

Tomato (Solanum lycopersicum) is one of the important crops among all the vegetables and very popular vegetable in Bangladesh. As the pathogen, R. solani is a soil borne pathogen and prefers damp, especially water logged conditions, the incidence of foot rot has been found more and causes a great economic loss every year in all tomato growing areas. We evaluated three Trichoderma isolates (T. harzianum TR05, T. virens TR06 and T. asperellum TR08) originating from Bangladesh as potential biological control agents against foot rot of tomato under greenhouse conditions. After seed treatment with TR05, there was a lower disease incidence (5.79%) of foot rot of tomato seedlings than for the other isolates, and the germination percentage of the tomato seedlings was also highest (89.7%). The other growth parameters were also promoted by inoculation with the Trichoderma isolates; particularly TR05 showed statistically higher root length (13.5 cm), shoot length (12.7 cm), dry weight (5.40 g) and seedling vigour index (2532.4). Thus, TR05 has potential as biological control agents against foot rot in tomato seedlings.Download


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